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Finding the Fourth Proportional to 90,655.77, 135,908.73 and 40,018.77

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Solution

The fourth proportional to 90,655.77, 135,908.73 and 40,018.77 is: 59,995.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,655.77 : 135,908.73 = 40,018.77 : x
  2. Step 2: Convert to fraction form
    90,655.77/135,908.73 = 40,018.77/x
  3. Step 3: Cross multiply
    90,655.77x = 135,908.73 × 40,018.77
  4. Step 4: Simplify right side
    90,655.77x = 5,438,900,206.86
  5. Step 5: Solve for x
    x = 5,438,900,206.86/90,655.77
  6. Step 6: Final answer
    x = 59,995.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.